Pin InfluxDB version to 1.8 until we add support for 2.0
Pin InfluxDB version to 1.8 until we add support for 2.0

Reported in https://github.com/loadimpact/k6/issues/1883, this fix should suffice until we get around to https://github.com/loadimpact/k6/issues/1730 and/or https://github.com/loadimpact/k6/issues/1614

loadimpact/k6,loadimpact/k6